Editor’s Note: This feature highlights water utility employees in the San Diego region working during the coronavirus pandemic to ensure a safe, reliable and plentiful water supply. The water industry is among the sectors that are classified as essential. LaMont Foster, Santa Fe Irrigation District Utility Worker I, is the Water Utility Hero of the Week.
San Diego County beaches earned nearly one-fourth of the spots on Heal the Bay’s annual Honor Roll for excellent year-round water quality, according to the environmental group report released Tuesday.
According to Santa Monica-based Heal the Bay, 42 out of more than 500 beaches across the state earned spots on the Honor Roll, which is reserved for beaches that score grades of A+ for water quality during all seasons and weather conditions.
Of those 42 beaches, 20 are in Orange County, the most for any county in the state. San Diego County has 10 beaches on the list, including five in Carlsbad. Los Angeles County has three — Palos Verdes Cove, Palos Verdes Long Point and Redondo State Beach at Topaz Street.
As coronavirus beach restrictions continue to complicate summer plans, Californians have at least one thing to look forward to: Most of the coast is much cleaner than in years past.
The City of Poway’s drinking water remains high-quality according to the city’s 2019 annual Water Quality Report.
The annual publication is a state and federal requirement that provides test results of water quality analysis conducted in 2019, according to a press release from the city. It is also called a Consumer Confidence Report and is intended to educate the public on the extensive monitoring done on tap water and the findings of those tests.
The Sweetwater Authority recently began a multiyear water main flushing program using innovative technology to clean all 400 miles of pipeline in its system. It’s part of Sweetwater Authority’s use of the latest technology to deliver a safe, reliable water supply to its South San Diego County customers.
Summertime means fun in the water, but as temperatures increase, algal blooms can grow in freshwater and marine ecosystems. Some algae are natural and life-giving, while others are the result of life out of balance and can have harmful effects. Consisting of bacteria and tiny plankton, they arise quickly and alter the ecosystem by consuming available oxygen, killing fish.
The Sweetwater Authority recently began a multiyear water main flushing program using innovative technology to clean all 400 miles of pipeline in its system. It’s part of Sweetwater Authority’s use of the latest technology to deliver a safe, reliable water supply to its South San Diego County customers.
Water main flushing cleans pipeline interiors by sending a rapid flow of water through them. Sweetwater’s program is the first in the region to use a new, innovative technology resulting in less environmental impact.
“We’re committed to providing our customers with high-quality water, ensuring that every drop meets safety standards and protects public health,” said Tish Berge, Sweetwater Authority general manager. “We’re also dedicated to providing the safe, reliable water through the use of best available technology and sustainable practices.”
See the system in action in the following video. A Spanish language version is also available.
Traditional flushing methods release water from fire hydrants at a high speed in order to flush out naturally occurring sediments accumulating in water pipes over time. Although the sediment itself is harmless, it can eventually affect water color and taste. The water used to clean the pipes often cannot be captured and ends up in the storm drain system.
The bulk of Sweetwater Authority‘s flushing program now eliminates the need to discharge water from fire hydrants during the cleaning process while delivering the same results.
With the closed-loop system and increased controls, crews are able to effectively and thoroughly flush large sections of pipeline with a single setup and staging area. This more efficient setup is less labor-intensive and allows the crew to maintain a safe hub for operations. Photo: Sweetwater Authority
Crews identify all pipes, valves, and fire hydrants located in the area to be flushed. Next, crews connect one end of a hose to a hydrant and the other end of the hose to the no discharge, or NO-DES flushing unit. The process repeats, connecting a second hose to another hydrant and the other end back into the flushing unit, creating a temporary closed loop.
Once the NO-DES flushing unit is turned on and the hydrants are open, water will push through the loop at high pressure, disrupting any accumulated sediment on the inside of the pipes. The water is pushed through a series of sock-like filters, which remove those sediments and return clean, high-quality water back into the system.
Crews closely monitor the filtration system and water quality to determine when flushing of each pipeline segment is complete.
Additional member water agencies have indicated an interest in the cost-effectiveness of purchasing the NO-DES flushing units for the region and collaborating to create a shared-use program with the technology. Photo: Sweetwater Authority
With the closed-loop system and increased controls, crews are able to effectively and thoroughly flush large sections of pipeline with a single setup and staging area. This more efficient setup is less labor-intensive and allows the crew to maintain a safe hub for operations.
In the National City area 75.8 miles of pipeline was recently flushed. Crews are now completing work in the Bonita area, and then will start work in Chula Vista.
Additional water agencies have indicated an interest in the cost-effectiveness of purchasing the NO-DES flushing units for the region and collaborating to create a shared-use program with the innovative technology.
“Securing a local water supply to ensure the water delivered is of the highest quality through the best technology in our projects and programs helps to maximize value for our customers while also being sustainable,” said Berge.
For more information on the program, go to www.sweetwater.org/flushing.
Most people take it for granted. You turn the faucet on, and water comes out.
But it isn’t that simple. In fact, it’s far more complicated to fill a glass with clean drinking water.
That’s one of the reasons why the City of San Diego’s Public Utilities Department is mailing residents the annual Drinking Water Quality Report this week.
“A lot of people just think that when you turn the tap water on, it’s just coming from the lakes and the streams,” said Michael Simpson, the Senior Water Operations Supervisor at the Alvarado Water Treatment Plant near Lake Murray.
Mounting public concerns and new state regulations in the U.S. are compelling water & wastewater utilities to address health risks associated with per- and polyfluoroalkyl substances (PFAS) – a class of pervasive chemicals found in drinking water and wastewater biproducts.
According to a new report from Bluefield Research, PFAS: The Next Challenge for Water Utilities, more than US $3 billion is forecasted to be spent annually on drinking water remediation technologies by 2030. While any significant increase in water treatment solutions hinges on federal policies, 29 states have already implemented a mix of policy directives, including testing requirements, prohibitions on product applications (e.g., food packaging), and the elimination of select fiirefighting foam constituents.
University at Buffalo chemists have shown that self-assembling molecular traps can be used to capture PFAS — dangerous pollutants that have contaminated drinking water supplies around the world.
The traps are made from iron-based and organic building blocks that connect, like Legos, to form a tetrahedral cage. Experiments showed that these structures bind to certain PFAS (short for per- and polyfluoroalkyl substances), and a lab analysis revealed how this happens. As it turns out, the PFAS stick strongly to the outside of the cages instead of getting caught inside, researchers say.
The Water News Network is San Diego County’s source for water news and information.
